1. DL manuals
  2. Daewoo
  3. DVD Player
  4. DV6T834
  5. Service Manual

Daewoo DV6T834 Service Manual - Specifications

Manual is about: DVD/VCD/CD player

Summary of DV6T834

  • Page 1

    S/m no. : vtb834net2 service manual model: dv6t834n/dv6t834 dv6t844n/dv6t844 dv6t854n/dv6t854 dv6t864n/dv6t864 dv6t935n/dv6t935 dv6t945n/dv6t945 dv6t955n/dv6t955 dv6t965n/dv6t965 ✔ caution : in this manual, some parts can be changed for improving, their performance without notice in the parts list. ...

  • Page 2: Contents

    1 specifications ...............................................................................................................2 advantages of this product....................................................................................3 trouble shooting.............................................

  • Page 3: Specifications

    2 specifications dvd audio output standards power ac 120v, 60hz consumed electricity 24w (supplementary 4w) weight 4.6kg dimension (wxhxd) 435mm x 93mm x 255mm operative temperature +5¡c~35¡c installation condition horizontal / relative humidity under 80% received channels vhf: 2-13 ch / uhf: 14-69 ...

  • Page 4: Advantages of This Product

    Advantages of this product 3 ¥ dvd, vcd, cd, cd-r(mp3), cd-rw, vhs playback function ¥ watching dvd for recording broadcast ¥ integrated remote control (vcr, dvd) ¥ viss function ¥ multiplex sound playback/record ¥ high sound quality of 6 head hi-fi (hi-fi model only) ¥ one touch timer recording (ot...

  • Page 5

    4 advantages of this product ¥ repeat a defined period from a to b (dvd) ¥ selective play (dvd/vcd/cd) you can select and play the desired title / chapter of dvd and track of video cd/cd in stop mode. ¥ various languages osd (on screen display) function (dvd) you can select and display osd among var...

  • Page 6: Troubleshooting

    5 troubleshooting 1. Power circuit ✓ caution you must use insulated transformer during the first part test of power circuit. Check ic601,ic751. No power power cord is ok? Is 200v~140v voltage obtained at c804 +? Output voltage of 2 nd parts is normal? Check rectifier diode of 2 nd parts ; d821, d822...

  • Page 7: 2. System Circuit

    2. System circuit 6 troubleshooting no led display. Is 5v obtained at ic751 pin #9, 25? Oscillation at ic751 pin #1? Specific grid/seg doesnÕt function. Check r830, d831, l751, l824. Exchange ic751. Check ic 751 pin #22~24, 27, 28, 30, 31. Check ic 751 pin #10~12, 14~21. No yes yes no no grid output...

  • Page 8

    7 troubleshooting noise appears on the playback screen. Is noise diminished by tracking adjustment. Noise band is trembled up and down? Re-adjust path. Is the height of ctl head normal? No dust? Is there problem in ctl input circuit and amplifier. Yes no no no is there ctl pulse at ic601 pin#97? Che...

  • Page 9

    8 troubleshooting no broadcasting signal received is the output at ic601 pin# 71(clk), 72 (data) normal? Is sif,video output at tmi(rf101) pin#13,16 normal? Check ic 601. Check ic301. Check ic601. Yes yes no no no is video signal input at ic601 pin#50? Is there video output at ic601 pin#52? Check tm...

  • Page 10

    9 troubleshooting cassette tape isnÕt inserted. Is 5v voltage obtained at loading parts ic601 pin#82? Is 13v voltage obtained at capstan motor p601 pin#8? Check at ever 13v check q854. Connect capstan and loading motor. Check connector and capstan motor. Yes no no no is 12v voltage obtained at each ...

  • Page 11

    10 troubleshooting f. Drum motor stops g. Capstan doesnÕt rotate capstan doesnÕt rotate. Is ever 13v voltage obtained at p601 pin#2? Yes no no no yes yes is capstan pwm fit to ic 601 pin#77? Is 3.2v voltage obtained at p601 pin#5? Is 2~3v voltage obtained at p601 pin#9? Check p601 connector and caps...

  • Page 12: 3. Video Circuit

    11 troubleshooting 3. Video circuit a. Ee screen doesnÕt appear ee mode picture ng is video signal input at ic301 pin#28, 30, 32? Is 5v supplied at pin#23, 45,52,68 of ic301? Is c.S, data, clock signal input pin#53,54,55 of ic301? Check if and line in jack. Check power circuit. Check ic601 pin #61, ...

  • Page 13

    12 troubleshooting b. Playback picture doesnÕt appear yes yes is signal output at ic301 pin#14? Is composite video signal input into ic301 pin#34? Is composite video signal output from ic301 pin#26? Replace ic301. Replace ic301. Pb video signal missing. Is envelope output from ic301 pin#14? No no ye...

  • Page 14

    13 troubleshooting is +5v supplied at ic301 pin#68? No no yes yes is video sw pulse input at ic301 pin#57? Is rec signal output from ic301 pin#66,73? Ep mode: 73 pin sp mode: 66pin check video head and connector. Is signal input into ic301 pin# 28,30,32? Check power circuit. Check ic601 pin#18. Reco...

  • Page 15

    14 troubleshooting e. No sound in broadcasting (stereo) is 12v obtained at ic251 pin#58? Is 5v obtained at ic251 pin#40? Yes no no yes yes is sif output from rf101 pin#15 to ic251 pin#48? Is audio output at ic251 pin#53, 57? Check output jack. Check power circuit. Check rf101. Exchange ic251. No no ...

  • Page 16

    15 troubleshooting no check pcb pattern check ffc cable & dvd module dvd composite signal doesnÕt appear is signal output at p101 pin# 7? Is signal at ic302 pin#2? No f. No dvd video yes yes remark previous 3-a no check q103, q104, q105 check ffc cable &dvd module no component signal at jk102 is sig...

  • Page 17: 4. Audio (Hi-Fi Model)

    16 troubleshooting 4. Audio (hi-fi model) no sound in rf e-e mode check output jack. A. No sound in e-e mode a. A.1 rf e-e no check ic601. Is audio signal output at ic251 pin#53, 57? Are clk and data obtained at ic251 pin#42,43? No is 5v obtained at ic251 pin#40? Is there sif signal at ic251 pin#48 ...

  • Page 18

    17 troubleshooting check output jack. A. B. Line1 e-e yes no check ic601. No sound in line1 e-e mode. Is 12v obtained at ic251 pin#58? No is 5v obtained at ic251 pin#40? Check power circuit. Yes no are clk and data obtained at ic251 pin#42,43? Check input line1 jack replace ic251 yes is audio signal...

  • Page 19

    18 troubleshooting a. C. Line2 e-e check output jack. Yes no check ic601. No sound in line2 e-e mode. Is 12v obtained at ic251 pin#58? No is 5v obtained at ic251 pin#40? Check power circuit. Yes no are clk and data obtained at ic251 pin#42,43? Check input line2 jack replace ic251 yes is audio signal...

  • Page 20

    19 troubleshooting a. D. Dvd e-e no sound in dvd e-e mode. Is there dvd audio at p101 pin#1, 3? Is 12v obtained at icd02 pin#8? Is audio(dvd) signal at ic251 pin#1,3? Yes yes is audio signal output at ic251 pin#53, 57? Check icd02. No yes yes are clk and data obtained at ic251 pin#42,43? Replace ic2...

  • Page 21

    20 troubleshooting is there playback audio signal at ic251 pin#53, 57? Are clk and data obtained at ic251 pin#42, 43? No is theremute(h) at ic251 pin#36? Check ic601. Yes is a.Sw signal input at ic251 pin #27? Check drum connector and drum. No check a.Sw at ic601 pin#19. No replace ic251. Yes no is ...

  • Page 22

    21 troubleshooting are there audio signal at ic251 pin#9,14 #10, 15 #2,4? Is there rec(h) at ic251 pin#29, 30? Check input line1 jack. Check input line2 jack. Check icd02(dvd). Replace ic251 yes no no no is fm osc signal at ic251 pin#21? Is fm osc signal at p301 pin#2? Check ic601 pin#22 c. No hi-fi...

  • Page 23

    22 troubleshooting e. No normal audio playback in record/playback mode(check in rec mode) no normal audio playback in record/playback mode are there audio signal at ic251 pin#9,14 #10,15 #2,4? Is there recording signal at ic251 pin#61? Check input line1 jack. Check input line2 jack. Check icd02(dvd)...

  • Page 24: Waveforms

    23 waveforms 1. Video ! (ic301-57) 5vp-p 1v/2msec/cm rec ! (ic301-57)5vp-p 1v/2msec/cm play @ (ic301-20) 520mvp-p 200mv/5usec/cm rec @ (ic301-20) 520mvp-p 200mv/5usec/cm play # (ic301-22) 520mvp-p 100mv/5usec rec # (ic301-22) 520mvp-p 100mv/5usec play $ (ic301-14) 600mvp-p 200mv/2msec/cm play(sp) vi...

  • Page 25

    24 waveforms 2. Audio 2-1 audio(normal) 2-2 audio(hi-fi) ( (ic301-76) 100mvp-p 20mv/0.5msec/cm rec ) (ic301-10) 1.5vp-p 0.5v/0.5msec/cm rec 1 (ic301-9) 2.3vp-p 0.5v/0.5msec/cm rec 2 (ic301-2) 120mvp-p 50mv/0.5msec/cm play 3 (p201-2) 75vp-p 10v/20 µ sec/cm rec 4 (ic251-9) 80mvp-p 20mv/0.5msec ee/rec/...

  • Page 26

    25 waveforms 3. Servo/syscon 0 (ic601-18) 5vp-p 2v/5msec/cm rec/play “ (ic601-77) 5vp-p 2v/5 µ sec/cm rec/play ‘ (ic601-76) 5vp-p 2v/5 µ sec/cm rec/play + (ic601-94) 3vp-p 1v/5msec/cm rec = (ic601-97) 4.4vp-p 1v/5msec/cm play q (ic601-90)25vp-p&5vp-p 1v/5msec/cm rec/play q (ic601-87) 2.5vp-p 1v/0.2m...

  • Page 27: Voltage Charts

    26 voltage charts 1. Servo/syscon/timer mi-com voltage charts mode mode mode pin no. Pin no. Pin no. 1 5.0 5.0 5.0 44 2.1 1.7 1.6 87 3.8 0.0 0.0 2 4.1 4.0 4.0 45 5.0 4.9 5.0 88 0.0 0.0 0.0 3 0.0 0.0 0.0 46 0.0 0.0 0.0 89 0.0 0.0 0.0 4 5.0 4.9 5.0 47 1.4 1.4 1.4 90 0.0 1.3 1.3 5 5.0 5.0 5.0 48 0.0 0....

  • Page 28

    27 voltage charts ic eeprom voltage charts mode mode pin no. Pin no. 1 0.0 0.0 0.0 5 4.4 4.5 4.5 2 0.0 0.0 0.0 6 4.4 4.5 4.6 3 0.0 0.0 0.0 7 0.0 0.0 0.0 4 0.0 0.0 0.0 8 0.0 4.9 5.0 ic led driver voltage charts mode mode pin no. Pin no. 1 2.1 2.1 2.1 17 2.6 2.4 2.6 2 3.9 3.9 3.9 18 1.4 1.4 1.4 3 4.8 ...

  • Page 29

    28 voltage charts 2. Ic a/v voltage charts mode mode mode pin no. Pin no. Pin no. 1 2.3 2.3 2.3 28 2.2 2.2 2.2 55 0.4 0.1 0.2 2 2.2 2.8 0.0 29 2.3 2.3 2.3 56 0.0 0.0 0.0 3 2.3 2.2 2.3 30 0.0 2.2 2.2 57 3.2 2.5 2.5 4 2.3 2.2 2.3 31 4.1 4.1 4.1 58 0.0 0.0 0.0 5 2.3 2.3 2.3 32 2.2 2.2 2.2 59 0.8 0.8 1....

  • Page 30

    Voltage charts 3. Ic hi-fi voltage charts mode mode mode 1 2.3 2.3 2.3 23 0.0 0.0 0.0 45 0.0 0.0 0.0 2 0.5 0.5 0.5 24 2.0 1.9 0.7 46 3.3 3.2 3.3 3 2.3 2.3 2.3 25 4.9 4.7 4.8 47 2.7 2.6 2.3 4 0.5 0.5 0.4 26 2.0 1.9 0.0 48 2.2 2.2 2.2 5 2.4 2.4 2.4 27 2.5 2.5 2.5 49 3.3 2.7 3.3 6 2.4 2.4 2.4 28 4.1 4....

  • Page 31

    30 circuit diagram 1. Power supply schematic diagram (ve 1.5 combo).

  • Page 32

    31 circuit diagram 2. Servo & syscon schematic diagram(ve 1.5 combo).

  • Page 33

    32 circuit diagram ic301 3. Video/audio schematic diagram(hi-fi) ve 1.5 combo.

  • Page 34

    33 4. Dvd audio & video schematic diagram(ve 1.5 combo) circuit diagram.

  • Page 35

    34 circuit diagram 5. Hi-fi & in-out schematic diagram(ve 1.5 combo).

  • Page 36

    35 circuit diagram 6. Dql-1003/1103/1203(ali m3351 mpeg ic).

  • Page 37

    36 circuit diagram 7. Dql-1003/1103/1203(rf-motor_dirivers).

  • Page 38

    37 circuit diagram 8. Dql-1003/1103/1203(flash, sdram).

  • Page 39

    38 circuit diagram 9. Dql-1003/1103/1203(audio_dac, video_channel).

  • Page 40

    39 circuit diagram 10. Dql-1003/1103/1203(system_power) no. Model name service code(f/w) mecha pickup remark 1 dql-1000/1003 ------------------h- ddm-4000/01 hop-1200 hitachi 2 dql-1100/1103 ------------------k- ddm-4010/11 spu3153 sankyo 3 dql-1200/1203 ------------------s- ddm-4020/21 hop-1200s hi...

  • Page 41

    40 pcb circuit board 1-1 . Vcr (main).

  • Page 42

    41 pcb circuit board 1-2. Power.

  • Page 43

    42 pcb circuit board 1-3. Dvd(main).

  • Page 44: Instrument Disassembly

    Instrument disassembly 1. Deck disassembly perform all disassembly procedures in the order presented. When reassembling, use the reverse procedure. Make sure that all leads/ wiring are routed correctly when reassembling. Fig. 1 a. Top cover removal @ remove two screws ! Remove three screws # remove ...

  • Page 45

    44 b. Panel front disassembly c. Logic pcb disassembly fig.2 fig.3 ! Remove 3 hooks at bottom @ remove 2 hooks at left and right sides, simultaneously, remove panel. Remove 2 screws, then remove logic pcb instrument disassembly.

  • Page 46

    45 instrument disassembly fig. 4 d. Deck and main parts disassembly ! Remove 6 screws, then remove deck @ remove 4 screws, then remove loader # remove 3 screws, then remove power pcb.

  • Page 47

    46 instrument disassembly fig. 5 e. Main pcb disassembly @ remove 2 screws, then remove main pcb ! Remove 2 screws.

  • Page 48

    47 instrument disassembly f. Main chassis disassembly fig. 6 ! Remove 4 screws, then remove main chassis.

  • Page 49

    48 instrument disassembly g. Explode view.

  • Page 50

    49 instrument disassembly 2. Dvd module(daewoo dql-10xx)disassembly a. Deck total dvd as.

  • Page 51

    50 instrument disassembly b. Drive unit as.

  • Page 52

    51 instrument disassembly c. Drive unit holder as.

  • Page 53

    52 instrument disassembly d. Pick-up tension as.

  • Page 54: Electrical Partslist

    53 electrical partslist loc parts_code parts_name parts_descr remark m100 97qd020100 dvd combi dsl-630 a21 2ch note 97q6010000 dvd mecha ddm-4001(hop1200)+plate earth loader note pvmgmsda09 pcb mpeg manual as dql-1003-2n0 progressive note m1000 pvdkarnc60 deck vcr as(t60) drn-t610r non p101a 97p88fa...

  • Page 55

    54 electrical partslist loc parts_code parts_name parts_descr remark cs01 hcbk103kba c chip cera 50v x7r 0.01mf k 1608 cs02 hcbk471kba c chip cera 50v x7r 470pf k 1608 cs03 hcfh104zba c chip cera 25v y5v 0.1mf z 1608 cs04 hcbk103kba c chip cera 50v x7r 0.01mf k 1608 cs07 hcqk201jba c chip cera 50v c...

  • Page 56

    Loc parts_code parts_name parts_descr remark rj054 hrfs000-ba r chip 1/16 0 ohm 1608 rj055 hrfs000-ba r chip 1/16 0 ohm 1608 rj056 hrfs000-ba r chip 1/16 0 ohm 1608 rs01 hrfs102jba r chip 1/16 1k ohm j 1608 rs02 hrfs122jba r chip 1/16 1.2k ohm j 1608 rs03 hrfs102jba r chip 1/16 1k ohm j 1608 z0012 p...

  • Page 57

    56 electrical partslist loc parts_code parts_name parts_descr remark l252 5cpx680j2t coil peaking 68uh(blu-blk) l301 5cpx101j2t coil peaking 100uh(brn-brn) l302 5cpx101j2t coil peaking 100uh(brn-brn) l304 5cpx101j2t coil peaking 100uh(brn-brn) l305 5cpx101j2t coil peaking 100uh(brn-brn) l306 5cpx101...

  • Page 58

    Loc parts_code parts_name parts_descr remark r111 rd-az102j- r carbon film 1/6 1k ohm j r112 rd-az102j- r carbon film 1/6 1k ohm j r115 rd-4z750js r carbon film 1/4 75 ohm j small r118 rd-4z750js r carbon film 1/4 75 ohm j small r121 rd-4z750js r carbon film 1/4 75 ohm j small r124 rd-4z750js r carb...

  • Page 59

    58 electrical partslist loc parts_code parts_name parts_descr remark rd18 rd-az223j- r carbon film 1/6 22k ohm j rs04 rd-az222j- r carbon film 1/6 2.2k ohm j rs05 rd-az101j- r carbon film 1/6 100 ohm j u001 97p65332ma pcb main 330x246x1.6t z801 pvpwmsn672 pcb power manual as dc-l83d1n-qs c801 cl2ee3...

  • Page 60

    686, ahyeon-dong mapo-gu seoul, korea c.P.O. Box 8003 seoul, korea telex : dwelec k28177-8 cable : "daewooelec" e-mail : cwhan@web.Dwe.Co.Kr tel : 82-2-360-7798 fax : 82-2-360-7877 daewoo electronics co., ltd..